LimeSDR Mini: Low-Cost, Small Size and Entirely Open Source Board

By on September 20, 2017
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Lime Microsystems has unveiled a size- and cost-reduced variant of the LimeSDR board that it launched last year. The LimeSDR Mini is a free and open source project that supports the company’s entirely open-source LimeSuite host-side software that supports a range of SDRs.
At 69 x 31.4mm, the LimeSDR Mini is about one-third the size of the original model, and is not meant to replace it.

The LimeSDR Mini targets the same types of applications as the original model: low-cost, multi-protocol cellular base stations and IoT gateways. Supported wireless protocols and communication standards similarly include UMTS, LTE, GSM, WiFi, LoRa, Bluetooth, Zigbee, RFID, Digital Broadcasting, among many others.

With Snappy Ubuntu Core’s built-in support for an app marketplace, LimeSDR apps can easily be downloaded, installed, developed, and shared. Additionally, the board’s host driver architecture supports both the SoapySDR and UHD APIs, providing further flexibility of application development.

Specifications listed for the LimeSDR Mini board include:

  • RF Transceiver — Lime Microsystems LMS7002M
  • FPGA — Altera MAX 10:
    • 169-pin FBGA package
    • 16K Les
    • 549KB M9K memory
    • 2,368KB user flash memory
    • 4x fractional phase locked loops (PLLs)
    • 45x 18×18-bit multipliers
    • 130x general purpose input/output (GPIO)
    • Single supply voltage
    • Flash feature
    • FPGA configuration via JTAG
  • Memory:
    • EEPROM memory — 256KB for RF transceiver MCU firmware/data
    • Flash memory — 4MB flash memory for data
  • Interfaces:
    • 8x FPGA GPIO pin-header (3.3 V)
    • USB 3.0 Type-A
    • Coaxial RF (SMA) connectors
    • FPGA GPIO and JTAG connectors
  • Other features:
    • Clock system — 30.72 MHz onboard VCTCXO; VCTCXO tunable via onboard DAC
    • LEDs — 2x dual-color (red/green)
  • Dimensions: 69 mm x 31.4 mm
  • Operating system support — Snappy Ubuntu Core (Linux), running on USB-connected host system







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